THIS IS WCVB, NEWSCENTER 5 AT N NOON. AND WE BEGIN WITH BREAKING NEWS, LOWELL POLICE ARE SEARCHING THE MERRIMACK RIVER AFTER PEOPLE REPORTED SEEING WHAT THEY BELIEVE WAS A BODY IN THE WATER. IT'S IN THE AREA OF 500 P PAWTUCKET, AND THE SEARCH TEAM AND DIVE TEAM HAVE BEEN ACTIVATED. WELDING SPARKS IS WHAT CAUSED THE BACK BAY FIRE LAST WEEK. I'M ERIKA WE LEARNED IT WAS WELDERS THE CAUSE OF THE FIRE, THEY WERE WORKING IN THE BACK OF THE BUILDING ON BEACON STREET WHEN THE FIRE BROKE OUT. INVESTIGATORS BELIEVE IT WAS AN ACCIDENT, BUT THEY'RE LOOKING INTO WHETHER SOMEONE WILL BE HELD RESPONSIBLE. WE'RE AWARE OF THE WELDING OPERATION AND THAT OPERATION WAS THE CAUSE OF THE FIRE. WITH ONE QUESTION ABOUT THE BEACON STREET FIRE ANSWERED, OTHERS LINGER, INCLUDING WILL ANYONE FACE CHARGES? AT THIS POINT INVESTIGATORS HAVE NOT YET DECIDED. WE DO KNOW THE WELDING WAS IN THE BACK OF THE BUILDING. THEY WERE REPAIRING AN IRON HAND RAILING. THERE WAS NO RECORD FOR A PERMIT PULLED AND NO FIRE DETAIL FOR THE SPARKS THAT FLEW INTO THE BUILDING SHINGLES. BEFORE THEY GOT INTO THE STRUCTURE BEHIND THE BUILDING, PROBABLY UP INTO THE BAY AND THEN EXTENDED VERTICALLY AND WHEN THE ONE COMING OFF THE OPENING, THE DOOR WAS OPEN AND EXTENDED THE FIRE FROM THE BASE AND ULTIMATELY THROUGH THE ROOF. LIEUTENANT EDWARD WALSH AND FIREFIGHTER MICHAEL KENNEDY FOUGHT THE FIRE, TOO MUCH. AND WE'RE CONFIDENT THIS WAS AN UNINTENTIONAL DEATH AT THIS TIME. IT WILL BE UP TO THE DISTRICT ATTORNEY'S OFFICE TO DETERMINE IF ANYONE WILL BE CHARGED. INVESTIGATORS WOULD NOT COMMENT ON WHETHER THOSE INVOLVED IN THE WELDING OPERATION ARE BEING BEING COOPERATIVE WITH THEIR INVESTIGATION.

A day after Trevor Noah was declared the new host of "The Daily Show," complete with the blessing of the exiting Jon Stewart, graphic tweets targeting women, Jews and victims of the Ebola virus are causing a social media backlash.